/Engine/Source/Runtime/Engine/Classes/Sound/SampleBufferIO.h
This kicks off an operation to write InSampleBuffer to aUSoundWaveasset at the specified file path relative to the project directory. This function should only be used in the editor. If aUSoundWaveasset already exists
bool BeginWriteToSoundWave ( const [FString](API\Runtime\Core\Containers\FString) & FileName, const [TSampleBuffer](API\Runtime\SignalProcessing\TSampleBuffer)<> & InSampleBuffer, [FString](API\Runtime\Core\Containers\FString) InPath, [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void(const [USoundWave](API\Runtime\Engine\Sound\USoundWave) *)> OnSuccess )